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    Volume 49, Issue 4

    Special Issue Paper

    Cellulose-Based Hydrogels as Smart, Green and Controllable Nitrogenous Fertilizers Releasing Agents

    (Received 16 June 2019; accepted 9 July 2019)

    Published Online: 03 September 2019

    CODEN: JTEVAB

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    Abstract

    A smart, green, and controllable-release hydrogel based on cellulose was prepared to avoid the problem of soil fertilizer abuse. A field-emission scanning electron microscope (FE-SEM) demonstrated a wrinkled, rough, lamellar structure with long microtubes. The effect of the cross-linker concentration, epichlorohydrin (ECH), on the physical and mechanical properties in addition to swelling and urea-release kinetics was thoroughly studied. A relatively high swelling ratio, urea entrapment, and proper flexibility were obtained for an ECH concentration of 3.33 %. The swelling kinetics of hydrogel was found to be a second-order process. The maximum swelling value and the initial swelling rate were dependent on cross-linker concentration. The hydrogel exhibited a dehydration shrinkage in saline solution. A significantly high urea release of 6.61 % at 3.33 ECH concentrations was estimated. The urea-release mechanism matches well with the Fickian model. Accordingly, the prepared hydrogel is potential as a smart, green, and controllable-release fertilizer for applications in agriculture and horticulture.

    Author Information:

    Sultan, M.
    Packaging Materials Department, National Research Centre, Dokki, Cairo

    Abdelhakim, A. A.
    Packaging Materials Department, National Research Centre, Dokki, Cairo

    Nassar, M.
    Packaging Materials Department, National Research Centre, Dokki, Cairo


    Stock #: JTE20190505

    ISSN:0090-3973

    DOI: 10.1520/JTE20190505

    Author
    Title Cellulose-Based Hydrogels as Smart, Green and Controllable Nitrogenous Fertilizers Releasing Agents
    Symposium ,
    Committee A06